html {
    width: 100%;
    height: 100%;
}

body {
    /*background-image: url(https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1514881472495&di=d9c07e5a09dd0cf25a9bf773b5d18591&imgtype=0&src=http%3A%2F%2Fpic.58pic.com%2F58pic%2F15%2F12%2F34%2F73C58PIC8uq_1024.jpg);*/
    /*background-repeat: no-repeat;*/
    background-color: #444444;
    background-image: -webkit-gradient(linear, left 0%, left 100%, from(#555555), to(#111111));
    background-image: -webkit-linear-gradient(top, #555555, #111111);
    background-image: -moz-linear-gradient(top, #555555 0%, #111111 100%);
    background-image: linear-gradient(to bottom, #555555 0%, #111111 100%);
    background-repeat: repeat-x;
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff555555', endColorstr='#ff111111', GradientType=0);
    background-attachment: fixed;
    padding: 0;
    margin: 0;
}

.textcolor {
    color: white;
}

.input-group {
    padding: 0 20px 5px;
}

.form-group {
    margin-bottom: 5px;
}
.container {
    text-align: center;
    margin-top: 10%;
}
#logo,
#loginbox {
    z-index: 100;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    float: none;
    display: block;
}

#loginbox {
    height: 290px;
    text-align: center;
    background: #ffffff;
    border-radius: 10px;
}

#loginbox .form-check {
    padding: 5px 20px 15px;
    border-radius: 0 0 30px 30px;
}
#loginbox .input-group,.form-group {
    padding-top: 10px;
}
#loginbox form {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 5%;
    left: 0;
}
#loginbox form#loginform {
    z-index: 200;
    /*opacity: 0;*/
    /*display: none;*/
}
#loginbox form#registerform {
    z-index: 100;
    opacity: 0;
    display: none;
}

#loginbox .float-left {
    text-align: center;
}


html,body{
    margin: 0;
    padding: 0;
}
/*满天星*/
audio{
    z-index: 5;
    position: absolute;
    bottom: 0;
    opacity: 0.1;
    -webkit-transition: all 2s;
    -moz-transition: all 2s;
    -ms-transition: all 2s;
    -o-transition: all 2s;
    transition: all 2s;
}
audio:hover{
    opacity: 1;
}
.wall{
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}
div#background{
    background: url("../img/preview3.jpg")no-repeat;
    -webkit-animation: dd 100s linear infinite;
    -moz-animation: dd 100s linear infinite;
    -o-animation: dd 100s linear infinite;
    animation: dd 100s linear infinite;
    background-size: cover;
}
div#midground{
    background: url("../img/midground.png");
    z-index: 1;
    -webkit-animation: cc 100s linear infinite;
    -moz-animation: cc 100s linear infinite;
    -o-animation: cc 100s linear infinite;
    animation: cc 100s linear infinite;
}
div#foreground{
    background: url("../img/foreground.png");
    z-index: 2;
    -webkit-animation: cc 153s linear infinite;
    -o-animation: cc 153s linear infinite;
    -moz-animation: cc 153s linear infinite;
    animation: cc 153s linear infinite;
}
div#top{
    background: url("../img/midground.png");
    z-index: 4;
    -webkit-animation: dd 100s linear infinite;
    -o-animation: dd 100s linear infinite;
    animation: da 100s linear infinite;
}
@-webkit-keyframes cc {
    from{
        background-position: 0 0;
        transform: translateY(10px);
    }
    to{
        background-position: 600% 0;
    }
}
@-o-keyframes cc {
    from{
        background-position: 0 0;
        transform: translateY(10px);
    }
    to{
        background-position: 600% 0;
    }
}
@-moz-keyframes cc {
    from{
        background-position: 0 0;
        transform: translateY(10px);
    }
    to{
        background-position: 600% 0;
    }
}
@keyframes cc {
    0%{
        background-position: 0 0;
    }
    100%{
        background-position: 600% 0;
    }
}

@keyframes da {
    0%{
        background-position: 0 0;
    }
    100%{
        background-position: 0 600%;
    }
}
@-webkit-keyframes da {
    0%{
        background-position: 0 0;
    }
    100%{
        background-position: 0 600%;
    }
}
@-moz-keyframes da {
    0%{
        background-position: 0 0;
    }
    100%{
        background-position: 0 600%;
    }
}
@-ms-keyframes da {
    0%{
        background-position: 0 0;
    }
    100%{
        background-position: 0 600%;
    }
}
